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创建大型 CSV 文件的最佳方法是什么。

我有一个用 nokogiri 解析的 XML 文件，现在我需要生成一个 CSV 文件，用于将产品导入 Magento。大概有 40 列，我只需要填写大约 10 列。

我丑陋的解决方案：

  require 'nokogiri'    
  csv_text = File.open("#{Dir.pwd}/app/controllers/ps_product.xml")
  @csv = Nokogiri::XML.parse(csv_text)
  CSV.open("#{Dir.pwd}/app/controllers/super.csv", "w+") do |csv|
    csv << [%q(sku,_store,_attribute_set,_type,_category,_root_category,_product_websites,color,cost,description,length,meta_description,meta_keyword,meta_title,name,price,short_description,status,url_key,visibility,weight,qty,min_qty,use_config_min_qty,is_qty_decimal,backorders,use_config_backorders,min_sale_qty,use_config_min_sale_qty,max_sale_qty,use_config_max_sale_qty,is_in_stock,notify_stock_qty,use_config_notify_stock_qty,manage_stock,use_config_manage_stock,stock_status_changed_auto,use_config_qty_increments,qty_increments,use_config_enable_qty_inc,enable_qty_increments,is_decimal_divided,_links_related_sku,_links_related_position,_links_crosssell_sku,_links_crosssell_position,_links_upsell_sku,_links_upsell_position,_associated_sku,_associated_default_qty,_associated_position,_tier_price_website,_tier_price_customer_group,_tier_price_qty,_tier_price_price,_group_price_website,_group_price_customer_group,_group_price_price,_media_attribute_id,_media_image,_media_lable,_media_position,_media_is_disabled)]
    @csv.xpath("//table").each do |produkt|
    text = produkt.xpath('*[@name="reference"]').text        + ',,"Hair extensions ",simple,"","Default Category",base,"Sort, farve nr. 1",,'
             produkt.xpath('*[@name="description"]').text    + ',"65 cm",'
             produkt.xpath('*[@name="meta_description"]').text  + ','
             produkt.xpath('*[@name="meta_keywords"]').text    + ','
             produkt.xpath('*[@name="meta_title"]').text       + ','
             produkt.xpath('*[@name="name"]').text           + ','
             produkt.xpath('*[@name="price"]').text         + ','
             produkt.xpath('*[@name="short_description"]').text + ',1,'
             produkt.xpath('*[@name="link_rewrite"]').text      + ',4,'
             produkt.xpath('*[@name="weight"]').text            + ','
             produkt.xpath('*[@name="quanity"]').text + ',0.0000,1,0,0,1,1.0000,1,0.0000,1,0,,1,0,1,0,1,0.0000,1,0,0,,,,,,,,,,,,,,,,,88,,,1,0'
    csv << text 
  end

我认为是代码不好而且是网格。

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